The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 16 |
| 3 | 98 |
| 4 | 643 |
| 5 | 5594 |
| 6 | 58602 |
| 7 | 737575 |
| 8 | 10609482 |
| 9 | 171524786 |
| 10 | 3063622641 |
| 11 | 59875563176 |
| 12 | 1270299719270 |
| 13 | 29076260441101 |
| 14 | 714274071132328 |
| 15 | 18746674985446278 |
| 16 | 523589036696879095 |
| 17 | 15507197067809135806 |
| 18 | 485494086155807224584 |
[2,16,98,643,5594,58602,737575,10609482,171524786, 3063622641,59875563176,1270299719270, 29076260441101,714274071132328,18746674985446278, 523589036696879095,15507197067809135806, 485494086155807224584] |